Don't globally map any variable use of QT_ARCH to ANDROID_ABI, as
that'll break if somebody uses it in a different context. Instead the
CMAKE_SYSTEM_PROCESSOR variable provides a reasonable value and it is
also set by the Android toolchain files.
Change-Id: Ibf203c39db586bbec5b800a365d83b3a509dbb62
Reviewed-by: Leander Beernaert <leander.beernaert@qt.io>
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
dcb1253d93